Gas supply fault High

Biasi Gas supply fault Fault Code

Also written as GASSUPPLYFAULT — same fault.

The Biasi Gas supply fault fault code means: your boiler is not receiving enough gas to light the flame or keep it running safely.. It appears on 1 Biasi model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: A fault on gas supply
Typical repair cost £100-350 (including labour)

DIY fix possible

Check that your gas emergency control valve is in the 'on' position.Verify that other gas appliances, such as a hob, are working to rule out a meter issue.If you have a prepayment meter, ensure you have sufficient credit and that the meter hasn't locked out.

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Biasi models that show the Gas supply fault fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Biasi Gas supply fault fault code information on this page is sourced and cross-checked against the official Biasi service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026